<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">
              {{this.currentCity}}
            </div>
          </div>
        </div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">
              {{this.currentCity}}
            </div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper"
            @click='handleCityClick("上海")'
          >
            <div class="button">
              上海
            </div>
          </div>
          <div class="button-wrapper">
            <div class="button">
              {{this.currentCity}}
            </div>
          </div>
          <div class="button-wrapper">
            <div class="button">
              {{this.currentCity}}
            </div>
          </div>
          <div class="button-wrapper">
            <div class="button">
              {{this.currentCity}}
            </div>
          </div>
          <div class="button-wrapper">
            <div class="button">
              {{this.currentCity}}
            </div>
          </div>
          <div class="button-wrapper">
            <div class="button">
              {{this.currentCity}}
            </div>
          </div>
        </div>
      </div>
      <div class="area"
        v-for="item of cities"
        :key="item.key"
        :ref='item.key'
      >
        <div class="title border-topbottom">{{item.key}}</div>
        <div class="item-list">
          <div class="item border-topbottom">阿拉尔</div>
          <div class="item border-topbottom">阿拉尔</div>
          <div class="item border-topbottom">阿拉尔</div>
          <div class="item border-topbottom">阿拉尔</div>
          <div class="item border-topbottom">阿拉尔</div>
          <div class="item border-topbottom">阿拉尔</div>
          <div class="item border-topbottom">阿拉尔</div>
          <div class="item border-topbottom">阿拉尔</div>
          <div class="item border-topbottom">阿拉尔</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  props: {
    letter: String
  },
  data () {
    return {
      cities: [
        {
          key: 'A'
        }, {
          key: 'B'
        }, {
          key: 'C'
        }, {
          key: 'D'
        }, {
          key: 'E'
        }
      ]
    }
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>

<style lang='stylus' scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    position relative
    &:before
     position absolute
     height 1px
     top 0
     left 0
     right 0
     background-color #ccc
     content ' '
    &:after
      position absolute
      height 1px
      bottom 0
      left 0
      right 0
      background-color #ccc
      content ' '
  .list
    position absolute
    overflow hidden
    top 1.78rem
    left 0
    right 0
    bottom 0
    .title
      line-height .54rem
      color #666666
      padding-left .2rem
      font-size .26rem
      background #eee
    .button-list
      overflow hidden
      padding .1rem .6rem .1rem .1rem
      .button-wrapper
        float left
        width 33.33%
        .button
          margin .1rem
          padding .1rem 0
          text-align center
          border .02rem solid #cccccc
          border-radius .06rem
    .item-list
      .item
        line-height .76rem
        color #000
        padding-left .2rem
</style>
